I have an American passport, but have not changed it there or on my residence card. I have only changed it with my bank account and my national insurance but that’s about it. I’m worried I will be fined
The important thing is that your US passport and visa (BRP card) both have exactly the same name on them. As long as they match, it shouldn’t be a problem.
Just looking at the Deed Poll website, it says you have to change your name on your passport first anyway. It’s the changing of the passport name that then triggers the beginning of the 3 months to change your BRP.
So, what I would do is travel for the holidays using your passport and BRP as they are, and then when you return to the UK and have a few months available where you can be without your passport and visa, change your name on the passport and then on the BRP.
Normally we recommend not changing your name on your passport until a couple of months before you apply for the next visa, so that instead of changing the BRP name, you just apply for the next visa in your new name. However, most people don’t change their name by deed poll, it’s just a case of deciding to use their married name rather than their old name.
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